Dr. Xiaoxian Song Profile

Dr. Xiaoxian Song

at Jiangsu Univ

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Publications (2)

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Proceedings Article | 18 March 2021 Paper

A polarized filtering gold-coated photonic crystal fiber at 1.55 μm based on surface plasmon resonance

Pengxiang Wang, Sibo Wang, Maosheng Yang, Xiaoxian Song, Haiting Zhang, Mingyang Chen, Jianquan Yao

Proceedings Volume 11780, 1178015 (2021) https://doi.org/10.1117/12.2590142

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In this paper, a polarization filter based on photonic crystal fiber (PCF) with nanoscale gold film is proposed and analyzed theoretically. The cross-section of the structure is composed of four-layer air holes with a hexagonal lattice and two symmetrical air holes in the sub-internal layer are coated with gold film. We research that the PCF structure parameters affect the performances of the polarization filter through employing the finite element method. It is indicated by the numerical results that the resonance strength in y-polarization direction can reach a most value of 272.8 dB/cm at the communication wavelength of 1.55 μm. The extinction ratio can be better than 20 dB within a wavelength range from 1.45 μm to 1.75 μm when the length of the PCF is longer than 500μm. Therefore, such a length can make the communication filtering effect be realized using a shorter fiber. The calculated results can provide some references to the design of polarization micro-filter devices.

Proceedings Article | 5 November 2020 Paper

Design of tunable terahertz metamaterial absorber

Xiaoxian Song, Bin Zeng, Pengxiang Wang, Sibo Wang, Jun Chen, Maosheng Yang, Qihang Chu, Haiting Zhang, Yunxia Ye, Yunpeng Ren, Xudong Ren, Jianquan Yao

Proceedings Volume 11564, 1156402 (2020) https://doi.org/10.1117/12.2576463

KEYWORDS: Metamaterials, Terahertz metamaterials

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Based on the influence of surface metal materials on electric field, a terahertz metamaterial absorber with a highly symmetrical open box was designed. Aiming at the traditional square ring absorber, the absorber is made of three open square rings and a pair of symmetrical strips of silicon. Starting from the structure and material of the absorber, the absorption rate of the absorber to the three-frequency band wave is regulated by changing the size of the surface metal ring, changing the thickness of the dielectric layer, changing the dielectric constant of the dielectric layer material, and adjusting the conductivity of the silicon material after the addition of semiconductor silicon. When no semiconductor silicon is added, the absorption rate of the absorber in the low frequency band reaches 94.77% and the absorption frequency band is 0.73thz. By increasing the thickness of dielectric layer, the phenomenon of redshift is obvious, which can realize the purpose of continuous frequency band absorption. By adding the silicon strip with symmetrical structure and changing the conductivity comparison, it is found that it can close the absorption peak in the high frequency band, reducing the absorption rate to less than %, and at the same time affecting the absorption rate of the low frequency band.

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